CXA1870 データシートの表示（PDF） - Sony Semiconductor

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CXA1870

Color TV Y/C/Jungle

Sony Semiconductor 

CXA1870S

Pin

Pin

Symbol

No.

voltage

27 V LPF

5V

Equivalent circuit

VCC

VCC

27

Description

Connect a capacitor to hold the

AGC voltage which maintains the

V sawtooth wave at a constant

amplitude.

28 V PLS

—

29

HD

—

30

XRAY

—

3.3 V

31

HP

(at no

signal)

VCC

VCC

74k

28

18k

VCC

V pulse output pin. A negative

polarity pulse 3 to 3.5 H width is

output from this pin.

High level: 4.5 V

Low level: 0 V

29

H drive output pin. This pin is

output at the open collector.

20k

20k

VCC

VCC VCC

19k

30

VCC

63k

30k

30k 27k

40k

VCC

VCC

10k

31

VCC

60k

X-ray protection circuit input pin.

When a pulse with a width of 7 V

or more is input, HD output

becomes low and R, G and B

outputs are blanked. This status

is maintained until the power

supply is turned off.

Vilmax = 2.4 V

Vihmin = 3.0 V

H pulse input pin. Inputs a 3 to 5

Vp-p signal via a capacitor.

32 J GND

—

—8—

Jungle system (H/V) GND pin.

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